How to create UIButtons anchored to the bottom of the view?

What's the best practice to create a few UIButtons in code that are anchored to the bottom of the view with a predefined spacing bet开发者_如何学Cween each?

Use the buttons' autoresizingMask property. If the parent view's only going to resize vertically, then that can just be set to UIViewAutoresizingFlexibleTopMargin.